Determination of the electronic energetics of CdTe nanoparticle assemblies on Au electrodes by photoemission, electrochemical, and photocurrent Studies

Yang Wang; Zuoti Xie; Gilad Gotesman; Lei Wang; Brian P. Bloom; Tal Z. Markus; Dan Oron; Ron Naaman; David H. Waldeck

doi:10.1021/jp306702t

Determination of the electronic energetics of CdTe nanoparticle assemblies on Au electrodes by photoemission, electrochemical, and photocurrent Studies

Yang Wang, Zuoti Xie, Gilad Gotesman, Lei Wang, Brian P. Bloom, Tal Z. Markus, Dan Oron, Ron Naaman^*, David H. Waldeck

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

This work explores the electronic states of CdTe semiconductor nanoparticles (NPs) that are immobilized on a polycrystalline Au film through an organic linker (dithiol). The HOMO and LUMO energies of the CdTe NPs were determined by using photoelectron spectroscopy and cyclic voltammetry. The results from these measurements show that the HOMO energy is independent of the nanoparticle size and is pinned to the Fermi level, whereas the LUMO energy changes systematically with the size of the NP. Studies with different capping ligands imply that the dithiol ligand removes surface states and enhances the optoelectronic properties of the NPs.

Original language	English
Pages (from-to)	17464-17472
Number of pages	9
Journal	Journal of Physical Chemistry C
Volume	116
Issue number	33
DOIs	https://doi.org/10.1021/jp306702t
State	Published - 23 Aug 2012
Externally published	Yes

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title = "Determination of the electronic energetics of CdTe nanoparticle assemblies on Au electrodes by photoemission, electrochemical, and photocurrent Studies",

abstract = "This work explores the electronic states of CdTe semiconductor nanoparticles (NPs) that are immobilized on a polycrystalline Au film through an organic linker (dithiol). The HOMO and LUMO energies of the CdTe NPs were determined by using photoelectron spectroscopy and cyclic voltammetry. The results from these measurements show that the HOMO energy is independent of the nanoparticle size and is pinned to the Fermi level, whereas the LUMO energy changes systematically with the size of the NP. Studies with different capping ligands imply that the dithiol ligand removes surface states and enhances the optoelectronic properties of the NPs.",

author = "Yang Wang and Zuoti Xie and Gilad Gotesman and Lei Wang and Bloom, {Brian P.} and Markus, {Tal Z.} and Dan Oron and Ron Naaman and Waldeck, {David H.}",

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AU - Wang, Yang

AU - Xie, Zuoti

AU - Gotesman, Gilad

AU - Wang, Lei

AU - Bloom, Brian P.

AU - Markus, Tal Z.

AU - Oron, Dan

AU - Naaman, Ron

AU - Waldeck, David H.

PY - 2012/8/23

Y1 - 2012/8/23

N2 - This work explores the electronic states of CdTe semiconductor nanoparticles (NPs) that are immobilized on a polycrystalline Au film through an organic linker (dithiol). The HOMO and LUMO energies of the CdTe NPs were determined by using photoelectron spectroscopy and cyclic voltammetry. The results from these measurements show that the HOMO energy is independent of the nanoparticle size and is pinned to the Fermi level, whereas the LUMO energy changes systematically with the size of the NP. Studies with different capping ligands imply that the dithiol ligand removes surface states and enhances the optoelectronic properties of the NPs.

AB - This work explores the electronic states of CdTe semiconductor nanoparticles (NPs) that are immobilized on a polycrystalline Au film through an organic linker (dithiol). The HOMO and LUMO energies of the CdTe NPs were determined by using photoelectron spectroscopy and cyclic voltammetry. The results from these measurements show that the HOMO energy is independent of the nanoparticle size and is pinned to the Fermi level, whereas the LUMO energy changes systematically with the size of the NP. Studies with different capping ligands imply that the dithiol ligand removes surface states and enhances the optoelectronic properties of the NPs.

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EP - 17472

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 33

ER -

Determination of the electronic energetics of CdTe nanoparticle assemblies on Au electrodes by photoemission, electrochemical, and photocurrent Studies

Abstract

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